Greeting all, I am completly new to Boost and this is my very first post here . I have used Boost.Serialization and Boost.MPI to send user-defined-datatypes across MPI processes. (I use OpenMPI 1.3.3 ) Now, I want to spawn processes (MPI_Comm_spawn) and send across these objects among newly created child processes. How can I handle Intercommunicators with Boost.MPI ? Thanks in advance, umanga